200-liter TNS inner coated steel drum and its packaging application
Text / You Fuyuan
I. Introduction
The 200-liter steel drum is a widely used metal packaging container in China's petroleum, food, chemical and forestry systems. It is often used as a large-scale loading and packaging container for the export of China's petroleum and chemical raw materials. The corrosion resistance of 200-liter ordinary steel drums is poor, which seriously affects the export tasks of emulsion pesticides and turpentine.
The TNS coating researched and developed by Sichuan Tainuosi New Material Technology Co., Ltd. is a new type of packaging protective material with very good corrosion resistance. Our factory has applied TNS electrostatic spraying technology and successfully produced 200-liter TNS-coated steel drums with the 200-liter oil-drum special steel plate of the third steel plant of Shanghai Iron and Steel Company, which solved the quality problems of export product packaging and created a favorable prospect for export product packaging.
2. Production process of 200-liter TNS-coated steel drums
The production process flow of our factory 200-liter TNS-coated steel drum is shown in Figure 1.
Figure 1 Flow chart of 200L TNS coated steel drum production process
3. Performance of TNS coating
After the TNS coating is formed into a film, the appearance is smooth and smooth, without wrinkle skin and no shedding phenomenon. Through physical, chemical, corrosion and sanitary toxicology tests, it is confirmed that the TNS coating has outstanding weather resistance, aging resistance, chemical corrosion resistance, damp heat, salt fog, and mold resistance. At the same time, the TNS coating has strong adhesion, high bending resistance, high impact strength and high temperature resistance. Table 1 shows the TNS coating properties.
Table 1 TNS coating properties
Numberingproject name
Reference standard or test method
result
1
thickness
GB 1764
80μm
2
hardness
Pencil hardness method
4H or more
3
Cold bend
D = 0, B = 50mm, 180 °
qualified
4
Adhesion
GB 1720
Level 1
5
Impact strength
GB 1732
50kg · cm
6
Weather resistance
Artificial rainfall simulation at 50 ℃, 1000 hours of xenon lamp irradiation
No obvious change in appearance
7
Heat resistance
Holding at 180 ℃ for 100 hours, continuous boiling in boiling water for 880 hours
No bubbles on the surface
8
Abrasion resistance
Manually spin with 50 pebbles or iron chains for 10 minutes
No flaking and scratches on the coating
9
Damp heat resistance test
GB 2423.4
No change in surface
10
Salt spray test
GB 2423.17
Good surface
11
Mold test
GB 2423.16
qualified
12
Hygienic toxicology test
White oil and TNS-soaked white oil to feed mice
Non-toxic, no abnormal
13
Chemical resistance test
TNS coating film sample soaked in 50% sulfuric acid for 5 days
No shedding and no rust
4. Application and economic benefits of 200-liter TNS coated steel drum packaging
The 200-liter TNS-coated steel drums have been widely used in honey, turpentine, spice oil, methamidophos, jinggangmycin, dimethoate, silicone, dibutyl phthalate and other foods after being packaged by some units nationwide. , Pesticides, spices and chemical raw materials on metal packaging containers. Some applications are summarized in Table 2.
Table 2 200L TNS coated steel drum packaging application examples
Application unitQuantity (only)
Packaged goods name
effect
A chemical plant in the Ministry of Chemical Industry
5000
Silicone
good
A solvent plant in Nanchang
3000
Dibutyl phthalate
good
A pesticide factory in Shanghai
1000
Jinggangmycin, malathion, etc.
good
A pesticide plant in Jiangxi
500
Methamidophos
good
A pesticide factory in Guangdong
500
Jinggangmycin etc.
good
A pesticide factory in Jiangsu
500
Rice blast
good
A pesticide factory in Zhejiang
500
Jinggangmycin, glucoamylase, etc.
good
A chemical plant in Jiangxi
500
turpentine
good
Various solvents loaded in 200-liter TNS-coated steel drums have the characteristics of long storage period and stable quality before and after loading, and are especially suitable for long-distance transportation of exported products. For turpentine, a forest chemical product with strong corrosive permeability, TNS steel drums, PVF inner coated steel drums and galvanized steel drums are packaged and stored for 2 to 3 months of comparative spot-check test. The above-mentioned three steel drums were spot-checked for 5 each. The spot-check situation is shown in Table 3. The results of random inspection show that the application of TNS steel drum packaging is good, no corrosion, no rust, and no change in the quality of turpentine. Its corrosion resistance and packaging effect are much better than traditional PVF steel drums and galvanized steel drums.
Table 3 Results of spot checks on 200-liter TNS steel drums, PVF steel drums and galvanized steel drums
Packaged goods nameShelf life
TNS steel barrel
Traditional PVF steel drum
Galvanized steel barrel
turpentine
70 days
No change
All slightly rusted
1 barrel lightly corroded
turpentine
90 days
No change
All are slightly corroded, one barrel of rust is slightly serious
2 barrels mildly corroded
The 200-liter TNS-coated steel drums have good corrosion resistance and significant packaging application effects, which not only solves the problems of metal packaging containers such as food, pesticides, spices and chemical raw materials, but also solves the problems of foreign products due to corrosion in foreign trade exports. Increased zinc, lead, iron, product deterioration, degradation and other issues. The use of 200 liters of TNS-coated steel drums to package exported products has improved the quality of the exported products, and the foreign exchange income of more than 600,000 US dollars has been increased for the country based on the export of more than 250 tons of pesticides. The export of turpentine to the UK, as a result of the application of 200-liter TNS-coated steel drums, guarantees the grade of the exported product, which increases by $ 100 per ton of turpentine. Obviously, 200-liter TNS-coated steel drums have brought greater economic benefits to foreign trade exports in the packaging of exported products.
Not only that, compared with traditional PVF coatings, TNS coatings also have the following advantages:
1. No smoke in construction: thoroughly solve the problem of serious smoke and odor during the construction of PVF inner coating on the market;
2. Energy saving and environmental protection: To solve the problem of excessively high temperature requirements of PVF coatings on the market, resulting in energy waste; the curing condition of this product is 230 ℃ for 10 ~ 12 minutes;
3. Large spray area: spray more than 5.5 200L steel drums per kg of paint;
4. Safety: This product is a non-hazardous chemical product, which completely solves the transportation problem and facilitates the legal and compliant storage of steel drum manufacturers.
5. Compared with similar coatings, the price is cheaper and the cost performance is higher.
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